ساخت سرویس systemd برای اجرای دائمی برنامه

sudo useradd --system --home /opt/myapp --shell /usr/sbin/nologin myapp
sudo mkdir -p /opt/myapp && sudo chown -R myapp:myapp /opt/myapp

sudo nano /etc/systemd/system/myapp.service

[Unit]
Description=My Node.js App
After=network.target

[Service]
Type=simple
User=myapp
Group=myapp
WorkingDirectory=/opt/myapp
EnvironmentFile=/opt/myapp/.env
ExecStart=/usr/bin/node server.js
Restart=always
RestartSec=5
StandardOutput=journal
StandardError=journal

# محدودیت‌های امنیتی
NoNewPrivileges=true
PrivateTmp=true
ProtectSystem=full
ProtectHome=true
LimitNOFILE=65535

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable --now myapp
systemctl status myapp --no-pager

journalctl -u myapp -f
journalctl -u myapp --since "1 hour ago" --no-pager
journalctl -u myapp -p err -n 50

sudo systemctl restart myapp
sudo systemctl stop myapp
sudo systemctl disable myapp
systemctl is-active myapp
systemctl is-enabled myapp

systemd-analyze verify /etc/systemd/system/myapp.service
systemctl status myapp --no-pager -l
journalctl -xeu myapp

# /etc/systemd/system/backup.service
[Unit]
Description=Nightly backup
[Service]
Type=oneshot
ExecStart=/usr/local/bin/backup.sh

# /etc/systemd/system/backup.timer
[Unit]
Description=Run backup nightly
[Timer]
OnCalendar=*-*-* 03:00:00
Persistent=true
[Install]
WantedBy=timers.target

# فعال‌سازی
sudo systemctl enable --now backup.timer
systemctl list-timers